Casing head



Parenteel oei. 2e, 192e.,

l rr @if GEORGE H. JAQUES, O CASPER, WYOMING.

oasmer Haan'.

Application filed September-25, 192.5. Serial No; 58,624.

The invention' relates to casingl heiad'sifoir oil wells and the likeand has for its object' to provide Aa novel form of head associated withmeans for effectively packing the joint between' tbe head and the tubingand for anchoring the ,tubing to the casing head-to prevent relativemovement between the casing and the enclosed tubing by anchoring the`tubing in the casing head in such manl() ing downward underits ownweight, after it has been set, and also to prevent the well pressureraising the tubing.

The. invention isillustrated in theaccorn'- panyingdrawings, in which iFig. 1 a sectional elevation of the head as applied tothe casing andtubing.

Fig. 2 is 'a -plan view of o ne of the .split` retaining rings for thepacking.

Fig. 3 is a partial sectional .elevation of the slips.

Fig. 4 isI a plan view of the latter.

, Fig. 5 is a plan view of the anchor or re-l taining ring.

Referring to the drawings, 1 indicates the main or tubular body portionof the head, which is internally screw threaded at 2 to en.- gage theupper threaded end of the well casing C, within which latter is'centered the string of well tubing l. The interior of the tubular body1 is provided with' annular shoulders 3, 4 and 5, the first twoshoulders being adapted to receive and support the lpacking meansinterposed betweentheinterior of the head and the exterior of thetubing. \The packing means aforesaid comprises 'a split packing'retainingring 6 seat-i 111g on the shoulder 3, one or more packingrings 7 of suitable material, the lowermost of which is seated onshoulder 4 and the upper edge of the retaining ring 6, and an uppersplit ring 8 of metal or the like, by `means of which the packing iscompressed and forced into intimate contact withthe interior wall of thehead and the outer surface of the tubing.

Fitting in the upper enlarged bore of the tubular member 1 is a sleevel10 having a tapered bore 11 and a shouldered lower rim 12 engaging theupper face of split ring 8 and serving to compressthe packing, when -thesleeve` 10 is forced downwardly in the tubular body portion 1.

Adjustably mounted in the tapered bore of the sleeve 10 'are slips 13having oppositely tapered upper and lower peripheral ner asto preventthe string of tubing mov? outer faces 14 and 15 and opposite-ly serratedinner faces 16 `and 17, the teeth 16 being downwardly inclined and theteeth 17 up- "lwardly incl-ined. These slips 13 are prefer ably formedoriginally as a tubular member having its exterior turned to produce theopposite tapers, bored to fit the exterior of `the tubing and havingoppositely inclined threads'turned in its interior, the tubular memberthus fashioned being split into three equal parts by means of al thinparting tool, so that each of the slips is arcuate in horizontal' crosssection and the three slips constitute tin annular series of wedgesinterposed between the tapered bore of the sleeve 10 and thetubing. y v

Secured in the upper end of the tubular member 1 is a series of studs orbolts 21 provided ontheir outer end with nuts`22, which bolts passthrough holes 20 in an anchor ring 18, the inner 'periphery of whichring is provided with a downwardly flaring or tapering 'surface 19cooperating with the up- 4 per tapered surface 14 of the slips 13.

The various parts are assembied as illustrated in Fig. 1 and, whenthe'nuts 22 are set up on the bolts or studs 21, the yanchor orretaining ring 18 is forced downward toward the'body portion 1, carryingwith it the slips pered surfaces between the rings 18and the slips andbetween the'interior of the sleeve ,13 and the sleeve 1 0. Thecooperating tacontaining the slips causes the teeth or serv rationsontheslips to bite into' the tubing T and lockthe latter securely to thebody 1 of the head. At the same time, ,the downward movement of thesleeve 10 compresses the packing 17 and causes the latter to effectivelyseal the joint between the tubing and the head to preventl the escape ofgaseous or liquid media at this point. The upwardly inclined teeth orserrations 17 prevent any\ downward movement of the tubing with re-,spect'to the casing, so that, after the tubing.

hasbeen setv and 4the yslips tightened up, the

further downward movement of the casing is prevented. Similarly, thedownwardly `inclined teeth or serrationslt lock theA packing againstupward movement due to well `pressure and thereby obviates anypossibility of blow outs. l

As thus constituted, it will be seen that lthe new casing-.head servesto support the weight of the anchored string of tubing within thecasing, preyents the well pressure from raising the string and, at thesaine time, eilects an absolutely duid tiglitipaclring between thetubing and the head,' thereby positively preventing" a blow out from anycause. The casing also obviates the necessity ot the application otlanding; clamps1 anchor clamps and all other supporting and retainingldevices usually employed in the application et the string,r oit tubingnin high pressure vvells and iirtl'ierinore renders it unnecessary tor'cutting landing nipples, since the tubing string may be landed andanchored in any desired position. lt will be further noted that this newtype of packing head is relatively simple, compactu may bev manufacturedat a small cost and when applied as shown, giieatlv conserves cellarspace and leaves all Working parts for con- 'trol of the vvellaccessible.

lWhile the invention has been villustrated and described with 1referenceto the Well tubing T, it Will be understood that it is not restricted touse with such tubing, but is equally applicable to smaller size casing,when the latter is employed in connection with the outer casing. 1

uWhat l claim is:

l. A casing head comprisinga tubular member adapted to be secured to theWell casino and provided with a series oiu internal shoulders annularpacking means supported by certain oit said shoulders7 an internally'tapered sleeve fitting the tubular member and sevingA to compress 'thepacking means, arcuate slips having. serrated inl ner faces andoppositely tapered upper and loiver peripheral outer races, the lowerperipheral outer 'faces engaging the tapered sleeve, an anchor ringhaving a tapered.

openiinr engaging 'the upper peripheral faces inca-,eee

of the slips,4 and bolts engaging' the upper edge oit the tubular memberfor adjusting the anchor ring.

2'. A casing head comprising a tubular member adapted to be secured tothe Well casing and provided with a series of internal shoulders,annular packing' means supported by certain ot said shoulders, aninternally tapered sleeve fitting the tubular member and serving tocompress the packing means, arcuate slips having oppositelv serratedinner faces to engage the Well tubing and oppositely tapered upper andlower peripheral outer faces, the lower peripheral outer faces engagingthe tapered sleeve, an anchor ring;v having a tapered opening` engagingthe upper peripheral faces of the slips, and bolts engaging the upperedge of the tubular member tor adjusting the ancnor ring.

.3. A casing head comprisinga tubular ineinber threaded to receive theupper end of a Well casing and having internal packingreceivingshouldersa an internally tapered sleeve engaging the upper partoit the bore of said tubular member., arcuate slips having;`- serratedinner faces to engage the Well tubing; and oppositely tapered upper andlower peripheral outer faces, the lovvei' peripheral outer :taceseniigaginu1 the taperedsleeve, an anchor ring having a tapered openingcooperating with the upper peripheral 'faces of the slips,-bolts rountedin the 'upper end ot the tubular member and pass'- ing through openingsin the anchor ring, and nuts on the bolts forcing thevanchor ring towardthe tubular ineniber.

In testimony whereof ll affix my signature.

GERGE H. JAQUES.

